.research-hero {
  background: linear-gradient(135deg, var(--green-pale) 0%, #FFFFFF 70%);
  padding: 56px 0 32px;
}
.breadcrumbs {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.breadcrumbs a { color: var(--green); }
.research-hero h1 {
  max-width: 880px;
  margin-bottom: 12px;
}
.research-hero__lead {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 760px;
}

.article {
  padding: 48px 0 80px;
}
.article__inner {
  display: grid;
  grid-template-columns: 240px minmax(0, 760px);
  gap: 56px;
  align-items: start;
}
.toc {
  position: sticky;
  top: 92px;
  font-size: 0.92rem;
  border-left: 2px solid var(--border);
  padding-left: 18px;
}
.toc h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.toc ol {
  list-style: none;
  counter-reset: toc;
  padding: 0;
  margin: 0;
}
.toc li {
  counter-increment: toc;
  margin-bottom: 8px;
}
.toc a {
  color: var(--text);
  display: block;
  padding: 4px 0;
}
.toc a::before {
  content: counter(toc) ". ";
  color: var(--green);
  font-weight: 600;
}
.toc a:hover { color: var(--green); text-decoration: none; }

.article__body {
  font-size: 1.05rem;
  line-height: 1.75;
  color: #1F2A1A;
}
.article__body h2 {
  font-size: 1.6rem;
  margin-top: 48px;
  margin-bottom: 16px;
  scroll-margin-top: 80px;
}
.article__body h2:first-child { margin-top: 0; }
.article__body h3 {
  font-size: 1.2rem;
  margin-top: 24px;
  margin-bottom: 8px;
  color: var(--green-dark);
}
.article__body p { margin: 0 0 16px; }
.article__body ul, .article__body ol {
  margin: 0 0 16px;
  padding-left: 22px;
}
.article__body li { margin-bottom: 6px; }

.callout {
  background: var(--green-pale);
  border-left: 4px solid var(--green);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin: 24px 0;
  font-size: 0.98rem;
}
.callout strong { color: var(--green-dark); }

.article__body .ref {
  display: inline-block;
  background: var(--green-pale);
  color: var(--green-dark);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0 6px;
  border-radius: 4px;
  vertical-align: super;
  margin-left: 2px;
  text-decoration: none;
  line-height: 1.4;
}
.article__body .ref:hover { background: var(--green); color: #fff; }

.references {
  background: var(--bg-section);
  border-radius: var(--radius);
  padding: 32px;
  margin-top: 56px;
  font-size: 0.95rem;
}
.references h2 {
  margin-top: 0 !important;
  margin-bottom: 20px;
}
.references ol {
  padding-left: 22px;
  margin: 0;
}
.references li {
  margin-bottom: 12px;
  padding-left: 4px;
}
.references li a { word-break: break-word; }

.disclaimer-box {
  border: 1px dashed var(--border);
  background: #FFFBF5;
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-top: 32px;
  color: var(--text-muted);
  font-size: 0.92rem;
}

@media (max-width: 960px) {
  .article__inner { grid-template-columns: 1fr; }
  .toc {
    position: static;
    border-left: 0;
    padding-left: 0;
    background: var(--bg-section);
    padding: 18px;
    border-radius: var(--radius);
  }
}